Image analysis – Image enhancement or restoration – Edge or contour enhancement
Patent
1997-08-18
1999-09-14
Rogers, Scott
Image analysis
Image enhancement or restoration
Edge or contour enhancement
382132, G06T 500
Patent
active
059534613
ABSTRACT:
A morphology operation is carried out on an original image signal representing a radiation image, and a morphology signal is thereby obtained. An edge signal, which represents a characteristic value with respect to an image edge portion in the radiation image, or a specific image signal, which represents a characteristic value with respect to a specific image portion having a contour of a predetermined size, is obtained from the morphology signal and the original image signal. An emphasis coefficient corresponding to the edge signal or the specific image signal is calculated from a conversion table. The conversion table is set such that the emphasis coefficient may take a positive value when the value of the edge signal or the specific image signal is larger than a predetermined threshold value. The conversion table is corrected such that, as a dose of radiation delivered during an operation for recording the radiation image becomes small, the threshold value may become large.
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"Basic Theory of Mathematical Morphology and It's Application to Mammogram Processing", Hidefumi Kobatake; Medical Imaging Technology, vol. 12, No. 1, Jan. 1994, pp. 59-66.
Fuji Photo Film Co. , Ltd.
Rogers Scott
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